Improvement in bit-stocks



w. MANUEL.

Bit-Stocks. No.147 851, Patented Feb. 24,1874.

UNITED STATES PATENT OEEIcE.

WARREN MANUEL, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN BIT-STOCKS.

Specification forming part of Letters Patent No. 147,851, dated February 24, 1874; application filed 7 August 2, 1,873.

To all whom it may concern:

Be it known that I, WARREN MANUEL, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Bit-Stocks, of which the following is a specification:

The object of my invention is to provide a cheap, simple, and convenient means of gaging the depth of a hole being bored by the means of a bit and bit-stock; and it consists of a hollow tube connected to the lower end of a bit-stock, and provided with a sliding socket, into which the bit is fastened by means of a set-screw. Near the upper end of this sliding socket is fitted another set-screw, which passes through a slide fitted upon the outside of this tube, which tube is provided with a slot running nearly its whole length; both these set screws pass through this slot.

The bit being secured into the socket, it may be drawn up into the hollow tube, so as to allow but a small portion of the length of the bit to project beyond the end of the tube. Now, if a hole be bored, when the depth is reached that the bit projects beyond the end of the tube, it comes in contact with the surface of the wood, and arrests the further progress of the bit, thus gaging the depth of the hole bored. The bit may be instantly adjusted so as to 7 project just the distance from its cutting end,

beyond the end of the tube surrounding it, as the depth of the hole desired to be bored, and it cannot go beyond this point.

0. Into this tube is fitted a socket, D, to re ceive the end of the bit E, which is confined therein by the thumb-screw F. This socket D slides back and forth within the tube, and is held at any desired point by the thumb-screw G, which passes through the slide H, which fits upon the outside of the tube over the slot in the same. By tightening this thumb-screw, the socket and slide are drawn toward each other until they gripe the edges of the tube between them, thus confining them temporarily in a permanent manner at any point on the tube desired.

Having described my invention, what I claim is As an article of manufacture, a bit-stock composed of head and sweep A, tube B, adjustable socket D, and confining-plate H, setscrews F and G, and slot 0, when all are constructed, combined, and arranged to operate substantially in the manner described, as and forthe purposes set forth.

WVARREN MANUEL.

Witnesses SYLvENUs WALKER, H. S. TALBOT. 

